Heat exchanging device



Dec. 17, 1929. c. McNElL 1,740,192

I HEAT nxcnmems DEVICE Fil 1928 2 Sheets-Sheer. l

/NVEN TOR. Chm/21.55 MCNEIL Dec. 17, 1929. c. Mc'NEIL 1,740,192

HEAT EKG/HANGING DEVICE Filed Dee; 11, 1928 2 Sheets-Sheet 2 iN VEN T06?Gmmss fil H- Patented Dec. 17, 1929 PATENT OFFICE CHARLES MCNEIL, OFGLASGOW, SCOTLAND HEAT EXCHANGING DEVICE Application filed December 11,1928, Serial No. 325,362, and in Great Britain July 11, 1928.

This invention relates to heat-exchanging devices for incorporation, forexample, in evaporators and crystallizers of the type including a drumor otherwise shaped containng vessel and a tubular structure rotatablewithin the vessel.

In the device according to the invention the rotatable structurecomprises a main pipe, vhich may be continuous or interrupted,journailed in the vessel and carrying near each end oi? the vessel ahollow spider in the term of tubular arms disposed radially of the mainpipe and integral with or detachably mounted on a box or the likecarried by, and open to the interior of, said pipe, said arms beinginterconnected or not by stays at or near the periphery, and banks ofpreferably straight parallel tubes extending lengthwise of the vesseland interposed between co-related arms of the ggllOllOW spiders, throughwhich banks either heating or cooling fluid is caused to pass, the fluidentering at one end of the main pipe, traversing the box at that end,passing thence through the set of hollow radial arms at that end, alongthe banks of longitudinal tubes,

hrough the second set of radial arms, through the second box, and hroughthe opposed end of the main pipe.

Each element comprising a pair of arms and connecting longitudinal tubesmay have independent connections to the main pipe.

A heat-exchanging device according to the invention is illustrated byway of example in the accompanying drawing in which 1 is a centralvertical section and Fig. 2 a transverse section on the line 22 of Fig.1.

Referring to the drawing, 1 denotes a cylindrical drum or vessel withinwhich is rotatable a tubular structure including radially disposed banksof straight parallelly arranged tubes 2 extending lengthwise of thevessel between co-related tubular spider arms 3 constituting headers.The said spider arms 3 radiate from boxes 4, 5 integral with hollow .4trunnions 6, 7 ournalled in bearings 8, 9 sustained by the end plates10, 11 and rigidly interconnecte'd by a pipe 12 coaxial with thetrunnions 6, 7.

The box 4- constitutes a single distribution 5o chamber communicatingwith all of the head- Eli) ers 3 radiating therefrom. The box 5 issubdivided by radial partitions 13 into ei ht compartments 14 eachcommunicating with a header 3 and each having an outlet port 15 openinginto the hollow trunnion 7.

l6 denotes internal ferrules titted into the inlet ends of the tubes 2.

The construction illustrated is adapted for use with steam as theheating luid to be passed through the tubes 2.

in operation, steam enters the hollow trunnion 6 and passes by way ofthe box 4 into the headers 3 radiating therefrom, along the banks oftubes 9. into the headers radiating "from. the box 5, into thecompartments 14:, and outwardly through the ports 15 into the hollowtrunnion 7 The ferrules 16 in the inlet ends of the tubes 2 serve toprevent any condensate in the tubes 2 from passing backwardly into thebox 4-. firs the elements attain their highest position the condensatein the tubes 2 flows into the box 5 whence it passes to the hollowtrunnion 7 by vay of the ports 15, reflux flow of the condensate beingimpossible due to the construction of the box 5.

The tubular structure may be rotated in any convenient manner, and thevessel may be subjected to vacuum.

The containing vessel is provided with inlet and outlet openings (notshown).

What I claim is 2- Tn combination with a liquid-containing vessel,coaxial fluid inlet and outletconnections and a structure incommunication with said connections and rotatable around the axis ofsaid connections, said structure comprising a box connected to the fluidinlet connection, a box connected to the fluid outlet connection, a setof headers radiating from each box, banks of tubes connecting said setsof headers, internal ferrules at the ends of the tubes adjacent to thefirst box and partitions subdividing the second box into compartments,one compartment for each header connected 95 to that box.

In testimony whereof I have signed my name to this specification.

CHARLES MoNEIL.

